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EP4082488B1 - Outil de montage et de démontage de composants d'implants - Google Patents

Outil de montage et de démontage de composants d'implants Download PDF

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Publication number
EP4082488B1
EP4082488B1 EP21170401.0A EP21170401A EP4082488B1 EP 4082488 B1 EP4082488 B1 EP 4082488B1 EP 21170401 A EP21170401 A EP 21170401A EP 4082488 B1 EP4082488 B1 EP 4082488B1
Authority
EP
European Patent Office
Prior art keywords
implant component
retaining
tool
retaining elements
implant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP21170401.0A
Other languages
German (de)
English (en)
Other versions
EP4082488A1 (fr
Inventor
Thomas Schulz
Alexander ETRINGER
Paolo Dalla Pria
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Waldemar Link GmbH and Co KG
Original Assignee
Waldemar Link GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to ES21170401T priority Critical patent/ES3029412T3/es
Application filed by Waldemar Link GmbH and Co KG filed Critical Waldemar Link GmbH and Co KG
Priority to EP21170401.0A priority patent/EP4082488B1/fr
Priority to KR1020237035412A priority patent/KR102859578B1/ko
Priority to AU2022267715A priority patent/AU2022267715A1/en
Priority to US18/556,751 priority patent/US20240197497A1/en
Priority to PCT/EP2022/060790 priority patent/WO2022229039A1/fr
Priority to BR112023022170A priority patent/BR112023022170A2/pt
Publication of EP4082488A1 publication Critical patent/EP4082488A1/fr
Application granted granted Critical
Publication of EP4082488B1 publication Critical patent/EP4082488B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4637—Special tools for implanting artificial joints for connecting or disconnecting two parts of a prosthesis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/30205—Three-dimensional shapes conical
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649—Ball-and-socket joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4619—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof for extraction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4622—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof having the shape of a forceps or a clamp
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4625—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
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    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4625—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
    • A61F2002/4627—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4625—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
    • A61F2002/4628—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/4638—Tools for performing screwing, e.g. nut or screwdrivers, or particular adaptations therefor
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2/46—Special tools for implanting artificial joints
    • A61F2002/4681—Special tools for implanting artificial joints by applying mechanical shocks, e.g. by hammering

Definitions

  • the present disclosure relates to a single tool for both assembling and disassembling implant components to each other, the implant components preferably being implant components of a joint implant, and a method to assemble and disassemble these implant components.
  • Modular implants that are adaptable to a patient have been a success for replacing synovial joints. Such a replacement may become necessary due to arthritis or trauma.
  • the modularity of these implants allows for highly customized joint replacements at reasonable costs.
  • US 5 417 693 A discloses an impactor/extractor holder for a femoral trial and/or a knee implant to hold and guide those items onto the resected end of a femur.
  • US 2008/249577 A1 discloses an implant for resurfacing a joint and a driver for the implant.
  • the inserter attaches to the head of the implant and is designed to facilitate the handling and insertion of an implant at a surgical site.
  • US 2005/209597 A1 discloses an instrument for use in removal of a prosthetic implant for use in performing arthroplasty.
  • US 2013/282120 A1 discloses a vertebral body replacement device includes a body member and a central rod member having two threaded portions and configured to be operatively associated with the body member.
  • a joint implant typically comprises a stem for anchoring the implant within the bone tissue of a bone adjacent to a joint to be replaced. After implantation of the stem, an implant component including a joint surface may be attached to the stem. This attachment is mostly achieved using above-noted tapered connection.
  • the present disclosure addresses these objectives by providing a tool according to claim 1, an implantation set according to claim 11 and comprising such a tool, an assembly method according to claim 13 using such a tool and a disassembly method according to claim 14 using such a tool.
  • a tool for assembling and disassembling a first implant component and a second implant component comprises a proximal end, a distal end, and a longitudinal axis. It further comprises an elongated force transmission structure for transmitting a force in a direction along the longitudinal axis, wherein the force transmission structure includes a proximally facing contact surface.
  • the tool also comprises two elongated retaining elements, wherein each retaining element has a distally facing retaining surface at a proximal end thereof, and an actuation mechanism.
  • the actuation mechanism is operable to move the retaining elements between a standby position and a retaining position, wherein in the retaining position the proximal ends of the retaining elements are closer to each other than in the standby position.
  • a further actuation of the actuation mechanism after assuming the retaining position causes a relative movement of the contact surface in relation to the retaining surfaces in a proximal direction.
  • the elongated force transmission structure allows for transmitting a force, in particular caused by an impact force applied to the distal end with a tool (e. g. a hammer) from the distal end to the proximal end of the force transmission structure (i. e. to the first implant component).
  • a tool e. g. a hammer
  • the force transmission structure serves as an intermediate means to transmit and direct an impact force to the first implant component for assembling the first implant component to the second implant component.
  • the elongated force transmission structure is able to protect the first component from direct contact with the impact tool by guiding and directing the impact force to the first component. This prevents the first component from being damaged by the impact force during fixation of the first implant component to the second implant component that may otherwise be caused by a more direct and less controlled application of the impact force.
  • the retaining elements are for retaining the first implant component during assembly and disassembly of this component to and from the second component.
  • the elongated retaining elements are positioned relative to each other for receiving the first implant component.
  • the retaining elements are positioned for placing the first implant component on their distally facing retaining surfaces.
  • the actuation mechanism is configured to move the retaining elements to the retaining position for retaining the first implant component.
  • the first implant component preferably rests on the distally facing retaining surface and in between the retaining elements.
  • the retaining elements allow for easy handling of the first implant component during assembly and disassembly.
  • the relative movement of the contact surface of the force transmission structure in relation to the retaining surfaces of the elongated retaining elements may be used for a pull-off movement of the first implant component in relation to the second implant component.
  • the contact surface of the force transmission structure may be in contact with the second implant component.
  • the further actuation of the actuation mechanism may cause a movement of the contact surface in the proximal direction so that the distally facing retaining surfaces move distally in relation to the contact surface.
  • the first implant component also moves distally so that a connection, in particular a friction fit (e. g. by a tapered connection), between the first implant component and the second implant component is released.
  • the further actuation of the actuation mechanism facilitates the disassembly of the first and second implant components without affecting the fixation of the implant to the bone tissue of a patient.
  • the actuation mechanism is particularly configured to convert a translational movement into a rotational movement of the retaining elements and, when the rotational movement of the retaining elements is blocked, to transfer the translational movement to the retaining elements for causing the relative movement of the distally facing retaining surfaces in relation to the contact surface in a distal direction.
  • the translational movement is a translational movement (preferably in the direction of the longitudinal axis) relative to the elongated force transmission structure and its proximally facing contact surface.
  • the actuation mechanism then converts this translational movement to a rotational movement of the retaining elements so that the proximal ends of the retaining elements rotate towards each other for assuming the retaining position.
  • Blocking of the rotational movement is particularly caused by the first implant component being present in between the proximal retaining elements and on the distally facing retaining surfaces. As a result, sides of the retaining elements facing each other may get in contact with the first implant component and block the rotational movement. Nonetheless, any blockage of the rotation may cause the transferal of the translational movement to the retaining elements.
  • the retaining elements are configured to perform at their proximal ends a gripping motion towards each other to assume the retaining position and a release motion away from each other to assume the standby position.
  • the gripping motion allows for capturing the first implant component between the elongated retaining elements and the contact surface of the force transmission structure.
  • the retaining surfaces of the retaining elements prevent a movement of the first implant component in a proximal direction, whereas the contact surface prevents a movement of the first implant component in a distal direction.
  • the release motion allows to release the first implant component from the tool after assembly or disassembly.
  • This configuration of the retaining elements provides for a secure and easy handling of the first implant component during assembly and disassembly.
  • the tool may further comprise a base member, wherein the retaining elements are each pivotable about a rotation axis having a fixed position on the base member.
  • This configuration not only allows for a defined movement of the retaining elements relative to the contact surface of the force transmission structure and the first implant component but also for a predetermined movement of the retaining elements relative to each other.
  • the actuation mechanism further comprises an actuation member, wherein the actuation member is arranged between distal ends of the retaining elements and includes a distally tapered portion.
  • the distal ends of the retaining elements are in contact with a slanted surface of the distally tapered portion.
  • This configuration including an actuation member presents a way to guide the distal ends of the retaining elements away from and towards each other. More specifically, a movement of the actuation member in the distal direction relative to the retaining elements causes the distal ends of the retaining elements to move along the slanted surface to a wider section of the actuation member's distally tapered portion, which results in an increased distance between these distal ends and vice versa.
  • the distal movement of the actuation member causes a movement of the retaining elements towards the retaining position (i. e. towards each other), whereas a proximal movement of the actuation member causes a movement of the retaining elements towards the standby position (i. e. away from each other).
  • the actuation member of this configuration provides a simple and effective mechanism to transform a longitudinal movement into a rotational movement of the two elongated retaining elements. Further, it allows for adjusting the transmission ratio between the longitudinal and rotational movement making it easier for a user to apply the force needed.
  • the actuation member is preferably movable relative to the base member along the longitudinal axis. Guided by the contact of the distal ends of the retaining elements with the slanted surface, a movement of the tapered portion relative to the base member distally pushes the distal ends of the retaining elements away from each other and the proximal ends of the retaining elements towards each other.
  • the actuation mechanism may further comprise a biasing means, wherein the biasing means is arranged between the base member and the actuation member and biases the base member and the actuation member away from each other along the longitudinal axis.
  • This bias also causes the elongated retaining elements of the tool to always assume a defined position relative to each other and relative to the contact surface of the force transmission structure, in particular since the bias keeps the retaining elements and the base member (in particular the slanted surface) in contact. Thus, there is no slack within the mechanisms of the tool when being handled. Having a bias towards the retaining position also prevents the first implant component from accidentally being released from the tool.
  • the force transmission structure is preferably arranged between the retaining elements and comprises a transmission rod, the transmission rod may have a through hole extending between the distal and proximal ends of the transmission rod for inserting a fastening tool.
  • the tool comprising the two elongated retaining elements and the interposed force transmission structure may generally have a symmetrical configuration. This allows for a balanced force application during assembly and disassembly of the first and second implant components.
  • the transmission rod extends along the longitudinal axis of the tool.
  • the transmission rod is in a threaded engagement with the actuation member so that a rotation of the transmission rod relative to the actuation member causes a movement of the actuation member along the longitudinal axis relative to transmission rod and in particular relative to the distal ends of the retaining elements.
  • the transmission rod allows a user to easily rotate the transmission rod (preferably at its distal end), which in turn results in a relative movement between the transmission rod and the actuation member in a longitudinal direction.
  • This relative movement of the actuation member particularly causes the retaining elements to move between the standby position and the retaining position.
  • the threaded engagement of the transmission rod and the actuation member also has the advantage that it allows for a transmission ratio enabling a precise, easy, and controlled movement of the retaining elements as well as assembly and disassembly of the implant components.
  • the base member particularly has a central through hole for guiding the transmission rod so that the transmission rod may move along and rotate freely relative to this through hole.
  • the force transmission structure further preferably comprises an adapter including the contact surface at a proximal end of the adapter and a rod coupling portion at a distal end of the adapter, wherein the rod coupling portion preferably allows for a relative rotation between the adapter and the transmission rod about the longitudinal axis.
  • an adapter at the proximal end of the transmission rod allows for adaptation of the contact surface to the distal surface of the first implant component. This has the advantage of enhancing the support of the tool. Further, the adapter may prevent a rotation during actuation of the transmission rod by a user.
  • the enhanced support for the force transmission structure by the adapter at the proximal end of the transmission rod particularly provides a basis for the relative movements from the transmission rod to the actuation member, from the actuation member to the retaining elements and from the retaining elements relative to the first implant component.
  • the adapter is preferably an assembly adapter for being in contact with the first joint implant component and/or a disassembly adapter for being in contact with the second joint implant component.
  • the contact surface of the adapter is preferably in contact with a distal surface, in particular a joint surface, of the first implant component for supporting the tool.
  • the support surface of the adapter When being configured as a disassembly adapter, the support surface of the adapter is in contact with a distal surface of the second implant component, for example via a through hole through the first implant component, and acts as a support for the tool during disassembly.
  • the actuation of the tool causes a relative movement between the distally facing retaining surfaces of the retaining elements and the contact surface of the transmission rod (and in particular of the adapter) so that the first implant component and the second implant component move away from each other.
  • the disclosure further provides an implantation set comprising a tool configured as described above, a first implant component, and a second implant component.
  • the first implant component includes a first connecting portion formed at a proximal end thereof and a through hole with a screw seat for an assembly screw.
  • the through hole extends between the proximal end and a distal end of the first implant component, wherein the first implant component preferably comprises a joint surface at the distal end.
  • the second implant component includes a second connecting portion formed at a distal end thereof and a threaded hole for receiving the assembly screw.
  • this implantation set provides above described advantages resulting in an easy assembly and disassembly of the first and second implant components.
  • the through hole of the first implant component at the screw seat is threaded and even more preferably in the opposite direction in relation to the threaded hole of the second implant component for capturing the assembly screw and serving as a screw seat during fixation.
  • the assembly screw preferably has an outer thread on the circumferential surface of the assembly screw's head, an outer thread at the opposite end of the assembly screw, and an intermediate section in between, wherein the intermediate section has a smaller diameter than the base diameter of each of these outer threads.
  • one of the first connecting portion and the second connecting portion comprises a male taper and the other one of the first connecting portion and the second connecting portion comprises a female taper.
  • Such a tapered connection provides for a reliable and releasable connection between implant components.
  • the angle of the tapered connection is also preferably configured to be self-locking.
  • the present disclosure further discloses a method for preparing a first implant component for assembly to a second implant component using a tool, in particular a tool that is configured as described above.
  • the tool comprises an actuation mechanism, two elongated retaining elements, and a force transmission structure.
  • the method comprises a step of placing the first implant component between proximal ends and onto distally facing retaining surfaces of the retaining elements, wherein the retaining elements are in a standby position for receiving the first implant component.
  • the retaining elements By actuating the actuation mechanism of the tool, the retaining elements assume a retaining position caused by the retaining elements moving closer to each other and by moving the force transmission structure so that a proximally facing contact surface at the proximal end of the force transmission structure abuts the first implant component.
  • the method allows to securely and easily handle the first implant component prior to entering the implantation site and assembly to the second implant component.
  • the present disclosure also provides a method for disassembling a first implant component and a second implant component using a tool, in particular a tool configured as described above.
  • the tool includes an actuation mechanism, two elongated retaining elements, and a force transmission structure, and may comprise the step of loosening an assembly screw that fastens the first implant component to the second implant component.
  • the first implant component is placed between proximal ends and onto distally facing retaining surfaces of the retaining elements, wherein the retaining elements are in a standby position for receiving the first implant component.
  • the actuation mechanism of the tool is actuated for assuming a retaining position by moving the retaining elements closer to each other and by moving the force transmission structure proximally to abut the head of the assembly screw with a proximally facing contact surface at the proximal end of the force transmission structure.
  • actuating the actuation mechanism continues for moving the retaining elements distally in order to pull the first implant component away from the second implant component.
  • This method is particularly directed at a connection between implant components that is based on a friction fit.
  • Disassembling the first implant component and the second implant component advantageously releases the two implant components from each other in a controlled and defined way without exerting an impact force on the patient that may adversely affect the interface formed between the bone tissue and the implant.
  • this method achieves disassembly of the implant components without the need for an impact tool such as a hammer to release the implant components from each other.
  • the implant may be more easily adapted to an anatomic environment (e. g. properties of tendons and muscles) that has changed over time due to aging of the patient. If needed, the replacement of worn implant components, in particular joint surfaces, is facilitated, which significantly increases the lifetime of the implant.
  • an anatomic environment e. g. properties of tendons and muscles
  • Figure 1 illustrates an exemplary embodiment of the tool 10 for assembling and disassembling implant components.
  • the tool 10 may, for example, be used for an implantation or revision of an implant component.
  • the assembly and disassembly of implant components may also take place outside of a patient's body.
  • the tool 10 has a distal end 11 and a proximal end 12 at opposite ends of the tool's longitudinal axis L.
  • the distal end 11 When being used during an implantation or revision of an implant component, the distal end 11 is directed away from whereas the proximal end 12 is directed towards the patient's body.
  • the tool 10 includes a force transmission structure 20 for transmitting an assembly force (in particular a compressive force or an impact force for causing a friction fit) along the longitudinal axis L of the tool 10, a retaining mechanism 30 for retaining a first implant component 1 (see figure 2 ), and an actuation mechanism 40 for actuating the retaining mechanism 30.
  • an assembly force in particular a compressive force or an impact force for causing a friction fit
  • a retaining mechanism 30 for retaining a first implant component 1 (see figure 2 )
  • an actuation mechanism 40 for actuating the retaining mechanism 30.
  • the force transmission structure 20 extends from the distal end 11 towards the proximal end 12 of the tool 10 and includes a transmission rod 22 for transferring a force along the longitudinal axis between the proximal and distal ends of the force transmission structure 20.
  • the transmission rod 22 is preferably integrally formed.
  • the force transmission structure 20 and in particular the transmission rod 22 may have an impact face 21 for exerting an impact force to the force transmission structure 20 that is then transmitted to the proximal end of this structure, where it can be applied to an implant component.
  • An impact force is typically applied during assembly of a first implant component 1 and a second implant component 5 for fixing these implant components to each other (see figures 3 to 5 ).
  • the transmission rod 22 may have a contact surface (not shown in this embodiment) for being in contact with an implant component 1 or 5 during assembly or disassembly.
  • the proximal end preferably includes a rod coupling portion 25.
  • This rod coupling portion 25 serves for mounting an assembly adapter 23 (see figures 3 to 5 , 8 and 9 ) or a disassembly adapter 24 (see figures 2 , 6, and 7 ).
  • the adapters 23 and 24 and the rod coupling portion 25 are preferably configured for an assembly using a snap-fit. Nonetheless, this skilled person will appreciate that other means may be used, such as a friction fit or an insertion of one of the rod coupling portion and the adapter into the other one of the rod coupling portion and the adapter, as long as a compressive force can be applied via the transmission rod 22 and either one of the adapters 23, 24.
  • connection between the transmission rod 22 and the adapters 23, 24 preferably allows for a relative rotation about the longitudinal axis L.
  • the transmission rod 22 may also comprise a through hole 27 for a fastening tool 50 (see figure 5 ).
  • the fastening tool 50 may, for example, be used for fastening and unfastening the first implant component 1 and the second implant component 5 via an assembly screw 9 for preventing an unintended loosening of these components (i. e. to secure them to each other).
  • the actuation mechanism 40 is for actuating the retaining mechanism 30.
  • the retaining elements 31 are able to retain and to release a first implant component 1.
  • the retaining mechanism 30 comprises two retaining elements 31.
  • the retaining mechanism 30 may also comprise more than two retaining elements 31, such as three, four or five retaining elements 31.
  • the retaining elements 31 are elongated and are arranged along the longitudinal axis L with the transmission rod 22 located in between.
  • the retaining elements 31 are configured to retain an implant component.
  • An implant component 1 may be retained between proximal retaining sections 34 of the retaining elements 31.
  • These proximal retaining sections 34 may enter corresponding retaining recesses 4 of the implant component 1 so as to retain the implant component 1 between these proximal retaining sections 34.
  • the engagement of the proximal retaining sections 34 also prevents a rotation of the implant component 1 about the longitudinal axis L relative to the tool 10.
  • the elongated retaining elements 31 include distally facing retaining surfaces 32 at their proximal ends. In a retaining position, these distally facing retaining surfaces 32 prevent a proximal movement of the implant component 1 in relation to the tool 10.
  • proximal retaining sections 34 of the retaining elements 31 may also be formed to extend at a distance along a part of (e. g. the distally facing) outer contour of a retained implant component 1 (first implant component). This configuration limits a movement of the implant component 1 in a distal direction, which particularly helps when mounting the first implant component 1 to the tool 10.
  • the contact surface 26 of the elongated force transmission structure 20 that prevents a movement of the implant component 1 in the distal direction. More specifically, the implant component 1 is retained in the proximal-distal direction between the distally facing retaining surfaces 32 and the proximally facing contact surface 26.
  • the retaining elements 31 are pivotably supported about rotation axes 33 (see for example figure 3 ) by a base member 35.
  • the rotation axes 33 are located more distally along the retaining elements 31.
  • the rotation axes 33 particularly extend perpendicular to and are arranged symmetrically and at a distance to the longitudinal axis L of the tool 10.
  • different configurations are also envisaged such as using one rotation axis 33 for the retaining elements 31.
  • Each of the retaining elements 31 includes at its distal end a gliding surface 36 facing in a direction towards the longitudinal axis L. As will be explained in the following, these gliding surfaces 36 interact with the actuation mechanism 40 in order to move (in particular pivot about the rotations axes 33) the retaining elements between a standby position and a retaining position in order to mount and unmount an implant component 1 at the proximal retaining section 34 of the retaining elements 31.
  • the actuation mechanism 40 comprises an actuation member 42.
  • the actuation member 42 includes a distally tapered portion 43 formed with a slanted actuation surface 44 to be in contact with the gliding surface 36 of each retaining element 31.
  • the slanted actuation surface 44 comprises two slanted actuation surfaces on opposite sides relative to the longitudinal axis L for interacting with the gliding surfaces 36 of the retaining elements 31, respectively.
  • the slanted actuation surfaces 44 are arranged at an angle to the longitudinal axis L and particularly face in a distal direction.
  • a movement of the actuation member 42 in the distal direction causes the distal ends of the retaining elements 31 to move away from each other due to the contact of the gliding surfaces 36 with the slanted actuation surfaces 44 of the actuation member's distally tapered portion 43 (cf. figures 3 to 4 ).
  • a movement of the actuation member 42 in the proximal direction allows for the proximal retaining sections 34 to move from the retaining position to the standby position and to release the implant component 1 (cf. figures 4 to 3 ).
  • the actuation mechanism 40 may further include a biasing means 45 (e.g. a spring).
  • the biasing means 45 is arranged and acts between the base member 35 and the actuation member 42. It preferably biases the base member 35 and the actuation member 42 away from each other along the longitudinal axis L and, thus, towards the retaining position of the retaining elements 31. This has the advantage that the tool 10 does not move unintentionally between the retaining position and the standby position.
  • an operator preferably actuates the actuation mechanism 40 via a rotation of the transmission rod 22.
  • the transmission rod 22 preferably comprises an actuation thread 28 that engages an actuation thread 46 of the actuation member 42. Consequently, turning the transmission rod 22 about the longitudinal axis L while holding the actuation member 42 in position (for example using a grip portion 47 of the actuation member 42) causes a relative translational movement between the actuation member 42 and the transmission rod 22 along the longitudinal axis L.
  • the distal end of the transmission rod 22 may include an operating section 29 such as a knob and/or a recess/through hole for inserting a lever arm.
  • FIGS 3 to 5 , 8, and 9 illustrate the process of assembling a first implant component 1 to a second implant component 5 using a tool 10 according to the present disclosure.
  • Figure 3 depicts the tool 10 in a standby position for receiving a first implant component 1.
  • the proximal retaining sections 34 of the retaining elements 31 are at a distance from each other perpendicular to the longitudinal axis L.
  • the first implant component can preferably pass by the distal ends of the retaining elements 31 in a distal direction until being in contact with the contact surface 26 of the force transmission structure 20.
  • the second implant component 5 is not necessarily present when mounting the first implant component 1 to the tool 10 in the standby position but may be added later during an assembly of the first implant component 1 to the second implant component 5 (e. g. the second implant component 5 may already be implanted).
  • the contact surface 26 is formed at the proximal end of an assembly adapter 23.
  • the assembly adapter 23 is attached to the proximal end of the transmission rod 22 and is in particular rotatable relative to the transmission rod 22 about the longitudinal axis L.
  • the contact surface 26 is preferably formed so as to correspond to the distally facing surface of the first implant component 1 the contact surface 26 abuts to.
  • the assembly adapter 23 shown in figures 3 to 5 is particularly adapted to a distally facing surface of the implant component 1 (e. g. joint surface) that is symmetrical about the longitudinal axis L in the contact area with the contact surface 26.
  • the implant component 1 e. g. joint surface
  • the assembly adapter 23 shown in figures 8 and 9 has a contact surface 26 configured to be in contact with a distally facing surface of the first implant component 1 that is asymmetrical in relation to the longitudinal axis L.
  • the assembly adapter 23 preferably comprises a collar 23a that fits into the aperture of the through hole 3 of the first implant component 1. The fit of the collar 23a is adapted to prevent the adapter 23 from slipping sideways relative to the longitudinal axis due to the asymmetrical surface 8 of the first implant component 1.
  • the adapter 23 and the retaining elements 31 may also comprise an interacting nose-recess configuration for preventing the adapter 23 to rotate about the longitudinal axis L, at least in the retaining position and in particular in case of an asymmetrical surface as described above.
  • Figure 9 shows an example of such a nose-recess configuration.
  • the adapter 23 includes a recess 23b and the retaining element 31 includes a nose 37.
  • the nose 37 protrudes into the recess 23b (here formed as a longitudinal groove) when the adapter 23 is assembled to the proximal end of the transmission rod 22.
  • the nose 37 is interacting with the recess 23b in both the standby position and the retaining position.
  • the implant components 1, 5 to be assembled are preferably joint implant components.
  • the distally facing surface 8 of the first implant component 1 is preferably the joint surface of the joint implant.
  • the relative rotation that is allowed between the transmission rod 22 and the assembly adapter 23 prevents a relative rotation between the contact surface 26 of the assembly adapter 23 and the joint surface of the first implant component 1. As described above, such a rotation may also be prevented by a nose-recess configuration between the adapter 23 and the retaining elements 31.
  • the assembly adapter 23 is made of a polymer for preventing the distally facing surface 8 of the first implant component 1 to be damaged.
  • An assembly adapter 23 made of a polymer also has the advantage that a relative rotation between the assembly adapter 23 and the first implant component 1 is unlikely to have an adverse effect on the distally facing surface of the first implant component 1.
  • a user may rotate the transmission rod 22 about the longitudinal axis L in order to cause a movement of the actuation member 42 in the distal direction relative to the transmission rod 22 due to the threaded engagement of the actuation threads 28, 46.
  • the distally facing retaining surfaces 32 of the retaining elements 31 are facing and support a proximally facing surface of the first implant component 1, and the tool 10 has assumed its retaining position (see figure 4 ).
  • the first implant component 1 is now retained between the distally facing retaining surfaces 32 of the retaining elements 31 and the proximally facing contact surface 26 of the assembly adapter 23.
  • the clamping force exerted between the distally facing retaining surfaces 32 and the contact surface 26 is adjusted by turning the transmission rod 22.
  • the tool 10 is configured to move from the standby position to the retaining position so that the proximal retaining sections 34 of the retaining elements 31 enclose the first implant component 1 before the contact surface 26 and the distally facing retaining surfaces 32 exert a clamping force to the first implant component 1.
  • the interaction between the slanted actuation surfaces 44 of the distally tapered portion 43 and the gliding surfaces 36 of the retaining elements 31, the location of the rotation axes 33 along the retaining elements 31 and/or the distance between the contact surface 26 and the distally facing retaining surfaces 32 along the longitudinal axis L may be configured to enhance this functionality of the tool 10 by adjusting the transmission ratios between these components of the tool 10.
  • the first implant component 1 may also comprise a retaining recess 4 for receiving a proximal retaining section 34 of a retaining element 31. This prevents an unintended rotation of the first implant component 1 relative to the tool 10.
  • releasing the first implant component 1 from the tool 10 may be achieved by actuating the tool 10 in the reverse direction.
  • the first implant component 1 includes a first connecting portion 2 and the second implant component 5 includes a corresponding second connecting portion 6 for attaching the first implant component 1 and the second implant component 5 to each other.
  • the connecting portions 2 and 6 are configured as a tapered connection, in particular a self-locking tapered connection.
  • the first implant component 1 and the second implant component 5 are assembled to each other using an impact force applied to the impact face 21 of the force transmission structure 20 and transmitted via the transmission rod 22 and the assembly adapter 23 to the first implant component 1.
  • the first implant component 1 moves towards the second implant component 5.
  • the implant components are preferably secured to each other using an assembly screw 9.
  • the assembly screw 9 is preferably fastened using a fastening tool 50 that is inserted into the through hole 27 of the force transmission structure 20 (i.e. the transmission rod 22 and the assembly adapter 23) and engages the head of the assembly screw 9.
  • the implant components 1, 5 may be secured to each other more easily due to being guided by the tool 10.
  • the first implant component 1 For securing the first implant component 1 to the second implant component 5 by an assembly screw 9, the first implant component 1 comprises a through hole 3.
  • the through hole 3 includes a screw seat 3a for engaging the head 9a of the assembly screw 9.
  • the assembly screw 9 includes an outer thread for engaging and inner thread of a threaded hole 7 included in the second implant component 5.
  • the through hole 3 as well as the threaded hole 7 are extending through the respective implant component 2, 5 in a proximal-distal direction (in particular along the longitudinal axis L).
  • the assembly screw 9 is fastened by its threaded engagement with the threaded hole 7 of the second implant component 5 until the head 9a of the assembly screw 9 interacts with the screw seat 3a of the through hole 3 of the first implant component 1. This secures the first implant component 1 to the second implant component 5 against unintended loosening.
  • the screw seat 3a is formed by and at a distal end of an inner thread within the through hole 3 of the first implant component 1.
  • the inner thread of the through hole 3 is even more preferably formed in an opposite direction in relation to the thread of the threaded hole 7 of the second implant component 5 (i. e. right hand thread and left hand thread or vice versa).
  • the head 9a of the assembly screw 9 may have an outer thread for engaging the inner thread of the through hole 3. Accordingly, the assembly screw 9 may be preassembled to the first implant 1 component by screwing the assembly screw 9 past the inner thread of the through hole 3.
  • the head of the assembly screw 9 does not engage the inner thread of the through hole 3 so that the inner thread of the through hole 3 acts as a screw seat 3a.
  • the assembly screw 9 further allows for an easy disassembly of the first and second implant components 1 and 5.
  • the assembly screw 9 Before disassembly, the assembly screw 9 is unfastened, preferably until it disengages the threaded hole 7 of the second implant component 5. In this state, the assembly screw 9 rests proximally in relation to the second connecting portion at the distal end of the threaded hole 7 (i. e. the threaded hole 7 acts as a screw seat for the threaded tip portion 9b of the assembly screw 9).
  • the tool 10 engages the first implant component 1 as described above by a user turning the transmission rod 22 of the force transmission structure 20.
  • a disassembly adapter 24 is employed for disassembly.
  • the disassembly adapter 24 is also mounted to the proximal end of the transmission rod 22.
  • the contact surface 26 of the disassembly adapter 24 does not interact with the first implant component but instead with the head 9a of the assembly screw 9 and via the proximal portion 9b of the assembly screw 9 with the second implant component 5.
  • the contact surface 26 of the disassembly adapter 24 abuts the head of the assembly screw 9 that has previously been unscrewed from the threaded hole 7 of the second implant component 5.
  • the first implant component 1 is clamped between the distally facing retaining surfaces 32 of the retaining elements 31 and the assembly screw 9.
  • the clamping force acts on the first connecting portion 2 of the first implant component 1 and the second connecting portion 6 of the second implant component 5 as a force separating these two implant components.
  • This interaction is used for disassembling the first implant component 1 from the second implant component 5, i.e. for releasing the connection between the first connecting portion 2 and the second connecting portion 6. This is achieved by actuating (i. e. turning) the transmission rod 22 further after the retaining position has been assumed so that the actuation member 42 moves further distally.
  • the further movement of the actuation member 42 in the distal direction causes the retaining elements 31 to move in the same direction. More specifically, since the proximal retaining sections 34 of the retaining elements 31 are prevented from moving further towards each other due to the first implant component 1 being interposed between the proximal retaining sections 34, the gliding surfaces 36 are not able to continue their movement along the slanted actuation surface 44 of the actuation member's distally tapered portion 43. Consequently, the retaining elements 31 and the base member 35 start moving distally relative to the transmission rod 22. For this relative movement, the through hole in the base member 35 is configured to let the transmission rod 22 move and rotate freely, as has been previously described above.
  • This movement of the retaining elements 31 in a distal direction results in a pull-off motion of the first implant component 1 caused by the contact of the first implant component with the distally facing retaining surfaces 32. Accordingly, disassembly of the first implant component 1 from the second implant component 5 is caused by a defined and controlled movement instead of an impact force.
  • the tool 10 illustrated in figure 6 may also include a biasing means 45 that has also been described in more detail above.

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  • Orthopedic Medicine & Surgery (AREA)
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  • Oral & Maxillofacial Surgery (AREA)
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Claims (14)

  1. Outil (10) pour assembler et désassembler un premier composant d'implant (1) et un second composant d'implant (5), l'outil comprenant :
    une extrémité proximale (12), une extrémité distale (11) et un axe longitudinal ;
    une structure de transmission de force allongée (20) pour transmettre une force dans une direction le long de l'axe longitudinal (L), la structure de transmission de force comportant une surface de contact orientée de manière proximale (26) ;
    deux éléments de retenue allongés (31), chaque élément de retenue présentant une surface de retenue orientée distalement (32) à une extrémité proximale de celui-ci ; et
    un mécanisme d'actionnement (40), dans lequel le mécanisme d'actionnement est apte à déplacer les éléments de retenue entre une position d'attente et une position de retenue, dans lequel, dans la position de retenue, les extrémités proximales des éléments de retenue sont plus proches l'une de l'autre que dans la position d'attente ; et
    dans lequel le mécanisme d'actionnement (40) comprend également un élément d'actionnement (42), l'élément d'actionnement étant disposé entre les extrémités distales des éléments de retenue (31) ; et
    caractérisé en ce que l'élément d'actionnement comporte
    une partie distalement conique (43), dans lequel les extrémités distales des éléments de retenue sont en contact avec une surface inclinée (44) de la partie distalement conique, de telle sorte qu'un actionnement supplémentaire du mécanisme d'actionnement (40) après avoir adopté la position de retenue provoque un mouvement relatif des surfaces de retenue distalement tournées (32) par rapport à la surface de contact (26) dans une direction distale.
  2. Outil (10) selon la revendication 1, dans lequel le mécanisme d'actionnement (40) est configuré pour convertir un mouvement de translation en un mouvement de rotation des éléments de retenue et, lorsque le mouvement de rotation des éléments de retenue est bloqué, pour transférer le mouvement de translation aux éléments de retenue pour provoquer le mouvement relatif des surfaces de retenue orientées distalement (32) par rapport à la surface de contact (26) dans une direction distale.
  3. Outil (10) selon la revendication 1 ou 2, dans lequel les éléments de retenue (31) sont configurés pour effectuer à leurs extrémités proximales un mouvement de préhension l'un vers l'autre pour prendre la position de retenue et un mouvement de libération l'un à l'écart l'un de l'autre pour prendre la position d'attente.
  4. Outil (10) selon l'une quelconque des revendications 1 à 3, comprenant également un élément de base (35), dans lequel les éléments de retenue (31) peuvent chacun pivoter autour d'un axe de rotation (33) présentant une position fixe par rapport à l'élément de base (35).
  5. Outil (10) selon les revendications 1 et 4, dans lequel l'élément d'actionnement (42) est mobile par rapport à l'élément de base (35) le long de l'axe longitudinal, dans lequel, guidé par le contact des extrémités distales des éléments de retenue (31) avec la surface inclinée, un mouvement de la partie conique (43) par rapport à l'élément de base (35) de manière distale, pousse les extrémités distales des éléments de retenue loin l'une de l'autre et les extrémités proximales des éléments de retenue l'une vers l'autre.
  6. Outil (10) selon les revendications 1 et 4 ou 5, dans lequel le mécanisme d'actionnement (40) comprend également un moyen de sollicitation (45), dans lequel le moyen de sollicitation est disposé entre l'élément de base (35) et l'élément d'actionnement (42) et sollicitant l'élément de base et l'élément d'actionnement à l'écart l'un de l'autre le long de l'axe longitudinal (L).
  7. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel la structure de transmission de force (20) est disposée entre les éléments de retenue (31) et comprend une tige de transmission (22), la tige de transmission comportant de préférence un trou traversant (27) se prolongeant entre les extrémités distale et proximale de la tige de transmission pour insérer un outil de fixation (50).
  8. Outil (10) selon la revendication 7, dans lequel la tige de transmission est en engagement fileté avec l'élément d'actionnement (42) de sorte qu'une rotation de la tige de transmission par rapport à l'élément d'actionnement provoque un mouvement de l'élément d'actionnement le long de l'axe longitudinal par rapport aux extrémités distales des éléments de retenue (31).
  9. Outil (10) selon la revendication 7 ou 8, dans lequel la structure de transmission de force (20) comprend également un adaptateur (23 ; 24) comporte la surface de contact (26) à une extrémité proximale de l'adaptateur et une partie de couplage de tige (25) à une extrémité distale de l'adaptateur, dans lequel la partie de couplage de tige permet de préférence une rotation relative entre l'adaptateur et la tige de transmission autour de l'axe longitudinal (L).
  10. Outil (10) selon la revendication 9, dans lequel l'adaptateur est un adaptateur d'assemblage (23) destiné à être en contact avec le premier composant d'implant articulaire (1) et/ou un adaptateur de démontage (24) destiné à être en contact avec le second composant d'implant articulaire (5).
  11. Ensemble d'implantation comprenant un outil (10) selon l'une quelconque des revendications précédentes, un premier composant d'implant (1) et un second composant d'implant (5), dans lequel le premier composant d'implant (1) comporte une première partie de connexion (2) formée à une extrémité proximale de celui-ci et un trou traversant (3) avec un siège de vis pour une vis d'assemblage (9), le trou traversant se prolongeant entre l'extrémité proximale et une extrémité distale du premier composant d'implant, dans lequel le premier composant d'implant comprend de préférence une surface de joint à l'extrémité distale, et
    le second composant d'implant (5) comporte une seconde partie de connexion (6) formée à une extrémité distale de celui-ci et un trou fileté (7) pour recevoir la vis d'assemblage.
  12. Ensemble d'implantation selon la revendication 11, dans lequel l'une de la première partie de connexion (2) et de la seconde partie de connexion (6) comprend un cône mâle et l'autre de la première partie de connexion et de la seconde partie de connexion comprend un cône femelle.
  13. Procédé de préparation d'un premier composant d'implant (1) destiné à être assemblé à un second composant d'implant (5) à l'aide d'un outil (10) selon l'une quelconque des revendications 1 à 10,
    dans lequel le procédé comprend les étapes suivantes :
    placer le premier composant d'implant entre des extrémités proximales et sur des surfaces de retenue orientées distalement (32) des éléments de retenue, dans lequel les éléments de retenue sont dans une position d'attente pour recevoir le premier composant d'implant, dans lequel le premier composant d'implant (1) comporte un trou traversant (3) comprenant un siège de vis (3a) pour entrer en prise dans la tête (9a) de la vis d'assemblage (9), la vis d'assemblage 9 comportant un filetage extérieur pour entrer en prise avec un filetage intérieur d'un trou fileté (7) comporté dans le second composant d'implant (5) ;
    actionner le mécanisme d'actionnement de l'outil pour adopter une position de retenue en rapprochant les éléments de retenue les uns des autres et en déplaçant la structure de transmission de force pour venir en butée contre le premier composant d'implant (1) avec une surface de contact orientée vers le proximal (26) à l'extrémité proximale de la structure de transmission de force ; et
    fixer la vis d'assemblage (9) par son engagement fileté avec le trou fileté (7) du second composant d'implant (5) jusqu'à ce que la tête (9a) de la vis d'assemblage (9) interagisse avec le siège de vis (3a) du trou traversant (3) du premier composant d'implant (1).
  14. Procédé de désassemblage d'un premier composant d'implant (1) destiné à être assemblé à un second composant d'implant (5) à l'aide d'un outil (10) selon l'une quelconque des revendications 1 à 10,
    dans lequel le procédé comprend les étapes suivantes :
    desserrer une vis d'assemblage (9) qui fixe le premier composant d'implant au second composant d'implant ;
    placer le premier composant d'implant entre les extrémités proximales et sur les surfaces de retenue orientées distalement (32) des éléments de retenue, dans lequel les éléments de retenue sont dans une position d'attente pour recevoir le premier composant d'implant ;
    actionner le mécanisme d'actionnement de l'outil pour adopter une position de retenue en rapprochant les éléments de retenue les uns des autres et en déplaçant la structure de transmission de force de manière proximale pour venir en butée contre la tête de la vis d'assemblage (9) avec une surface de contact orientée vers le proximal (26) à l'extrémité proximale de la structure de transmission de force ;
    après que les éléments de retenue ont pris la position de retenue, continuer avec l'actionnement du mécanisme d'actionnement pour déplacer les éléments de retenue de manière distale afin de retirer le premier composant d'implant du second composant d'implant.
EP21170401.0A 2021-04-26 2021-04-26 Outil de montage et de démontage de composants d'implants Active EP4082488B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP21170401.0A EP4082488B1 (fr) 2021-04-26 2021-04-26 Outil de montage et de démontage de composants d'implants
ES21170401T ES3029412T3 (en) 2021-04-26 2021-04-26 Tool for assembling and disassembling implant components
AU2022267715A AU2022267715A1 (en) 2021-04-26 2022-04-23 Tool for assembling and disassembling implant components
US18/556,751 US20240197497A1 (en) 2021-04-26 2022-04-23 Tool for assembling and disassembling implant components
KR1020237035412A KR102859578B1 (ko) 2021-04-26 2022-04-23 임플란트 부품 조립 및 분해를 위한 도구
PCT/EP2022/060790 WO2022229039A1 (fr) 2021-04-26 2022-04-23 Outil de montage et de démontage d'éléments d'implant
BR112023022170A BR112023022170A2 (pt) 2021-04-26 2022-04-23 Ferramenta para a montagem e a desmontagem de componentes de implantes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21170401.0A EP4082488B1 (fr) 2021-04-26 2021-04-26 Outil de montage et de démontage de composants d'implants

Publications (2)

Publication Number Publication Date
EP4082488A1 EP4082488A1 (fr) 2022-11-02
EP4082488B1 true EP4082488B1 (fr) 2025-04-02

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EP21170401.0A Active EP4082488B1 (fr) 2021-04-26 2021-04-26 Outil de montage et de démontage de composants d'implants

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US (1) US20240197497A1 (fr)
EP (1) EP4082488B1 (fr)
KR (1) KR102859578B1 (fr)
AU (1) AU2022267715A1 (fr)
BR (1) BR112023022170A2 (fr)
ES (1) ES3029412T3 (fr)
WO (1) WO2022229039A1 (fr)

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Also Published As

Publication number Publication date
EP4082488A1 (fr) 2022-11-02
BR112023022170A2 (pt) 2024-02-27
KR20240001695A (ko) 2024-01-03
ES3029412T3 (en) 2025-06-24
US20240197497A1 (en) 2024-06-20
KR102859578B1 (ko) 2025-09-16
AU2022267715A1 (en) 2023-10-19
WO2022229039A1 (fr) 2022-11-03

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